I think you misunderstand my point. Even if you replace Islam here with another religion, the cutural makeup of Pakistan, especially in certain govern-less areas is quite extreme in practice. The religion is often used as a convenient excuse that masks underlying cultutral issues or just disgusting practices and beliefs.
I think Sunni Islam is one of the real, underlying causes. I mean, what else would it be? It's not poverty or inequality--plenty of the worst religious radicals are wealthy and well-connected. It's not solely Western imperialism--China, India, and non-Muslim Africa were all royally screwed but don't have the same level of religious oppression. It's not education--this problem has been happening in liberal universities (and on the flipside, barely happens in non-Muslim poorly-educated places around the world).
I don't think it's a stretch to think that an ideology that prescribes death for blasphemers or apostates ends up killing lots of perceived blasphemers and apostates.
Islam didn't have to be this way (and Saudi Arabian style Wahhabism is a big reason it became this way), but the problem is real and getting worse.
There's areas within the country that take Christianity and distort beliefs in much of the same way to serve ulterior, non-religious beliefs but that's not reflective of the religion but a deeper underlying issue.
I mean, so much of Pakistans various societies attempt to add validitiy to their practices via religion. And that in itself is a cause of a lot of inner-cultural conflict. There have been dudes who have tried to use religion to justify selling off kids to sex traffickers and the like. They prey on the uneducated, and religion is just that extra tool in the arsenal to help them to do so.
You could take it out but I don't think it would remotely come close to solving the problem.
Edit: For example, when I was a kid in Peshawar, our neighbors went out and killed another guy because he had cut them off in traffic. They threw a celebration for having killed him and invited my dad alongside most of the neighborhood. Their justification for the murder was religion but we all know that's just a mask. And a lot of that happens in Pakistan. Way too much.